<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px;
            height: 100px;
            background-color: green;
            padding: 50px 10px;
            border: 5px solid blue;
            margin: 100px 50px;
        }
    </style>
</head>
<body>
    <div>
        我是内容
    </div>
    <p>我是p标签</p>
</body>
</html>